Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1989-04-21

1992-01-28

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428336, 428694, 428900, G11B 2300

Patent

active

050843435

ABSTRACT:
A magnetic recording medium is disclosed, comprising a non-magnetic support having thereon plural magnetic layers containing ferromagnetic particles dispersed in a binder including at least one inner magnetic layer and an outer magnetic layer, wherein said ferromagnetic particles present in said outer magnetic layer are Co-FeOx (1.33.ltoreq.x.ltoreq.1.5) having a coercive force of from 800 to 1000 Oe, an average length in the long axis of less than 0.30 .mu.m as measured transmission by electronmicroscope, and a crystallite size of less than 300 .ANG. as measured by X-ray diffraction, and, the crystallite size and the thickness of the inner magnetic layer are larger than those of said outer magnetic layer.

REFERENCES:
patent: 4624883 (1986-11-01), Yamaguchi et al.
patent: 4784895 (1988-11-01), Mizuno et al.
patent: 4847147 (1989-07-01), Aonuma et al.
patent: 4851289 (1989-07-01), Ogawa et al.
patent: 4863793 (1989-09-01), Ogawa et al.
patent: 4946374 (1990-08-01), Yamaguchi et al.
patent: 4946740 (1990-08-01), Ono et al.

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